16= 4x - 4 Combine like terms in this case (16 & 4) because they are only numbers 1) Pass the (-4) to the lther side so (-4) will become (4) 2) Add 16+4=4x 3) Once you already add, the result of the addition, divides by (4x) The answer: 16=4x - 4 1) 16+4= 4x 2) 20= 4x 3) 20/4=x 4) 5=x So the answer is "c"